
# import time

# def show_time(func):
#     def inner():
#         start = time.time()
#         func()
#         stop = time.time()
#         print('time: %s ' %  (start-stop))
#     return inner

# @show_time # => foo=show_time(foo)
# def foo():
#     print('foo...')
#     time.sleep(2)

# foo()


# def dec1(func):  
#     print("1111")  
#     def one():  
#         print("2222")  
#         func()  
#         print("3333")  
#     return one  

# def dec2(func):  
#     print("aaaa")  
#     def two():  
#         print("bbbb")  
#         func()  
#         print("cccc")  
#     return two  

# # test = dec1(dec2(test))  bbb,test test, ccc

# @dec1  
# @dec2    
# def test():  
#     print("test test")  

# test()


# def makebold(fn):
#     def wrapper():
#         return "<b>" + fn() + "</b>"
#     return wrapper
 
# def makeitalic(fn):
#     def wrapper():
#         return "<i>" + fn() + "</i>"
#     return wrapper

# hello = makebold(makeitalic(hello))

# @makebold
# @makeitalic
# def hello():
#     return "hello alvin"
 

# print(hello())


# a = (x for x in range(10))

# print(type(a))



# def foo():
# 	print('OK')
# 	yield 1

# # print(foo())
# next(foo())

# a = '123qweasd'
# print(iter(a))
# for i in iter(a):
# 	print(i)

# import time


# print(time.gmtime(time.time()))
# print(time.localtime())
# print(time.strftime('%y-%m-%d %H:%M:%S %I:%M %p %z',time.localtime()))
# # print(help(time))
# print(time.strptime('2018-08-25 14:20:20', '%Y-%m-%d %H:%M:%S'))

# print(time.ctime())
# print(time.mktime(time.localtime()))

# import datetime

# print(datetime.datetime.now())
# print(help(datetime.datetime))

# import random

# def yanzhengma():
# 	code = ''
# 	for i in range(5):
# 		word = random.choice([str(random.randrange(10)), chr(random.randrange(65,91))])
# 		code += word
# 	return code

# print(yanzhengma())

# import os 

# # print(os.pardir)
# print(os.listdir('.'))
# # print(os.stat('.git'))
# # print(os.sep)
# # print([os.linesep])
# # print(os.pathsep)
# # print(os.name)
# # print(os.environ)
# print(os.path.basename('basic.py'))

# import sys

# print(sys.version)
# print(sys.path)
# print(sys.platform)

# import hashlib

# # print(help(hashlib))

# # m = hashlib.md5()

# # print(m.hexdigest())

# # m = hashlib.md5('alex'.encode('UTF8'))

# # print(m.hexdigest())

# m = hashlib.sha256('Alex'.encode('UTF8'))

# print(m.hexdigest())

# import re

# print(re.search('www', 'www.runoob.com').span())

strr='1 - 2 * ((60-30+1*(9-2*5/3+7/3*99/4*2998+10*568/14))-(-4*3)/(16-3*2))'

print('YES')